sitemap in htaccess

Hi, I’m having some issues with my site https://www.modish.co.nz. I migrated it yesterday from an old domain to another. When I ask Google Search Console to index a page it says blocked by robots.txt but my robots.txt file is just a basic WP one –

User-Agent: *
Allow: /wp-content/uploads/
Disallow: /wp-content/plugins/
Disallow: /wp-admin/
Disallow: /readme.html
Disallow: /refer/

Sitemap: https://www.modish.co.nz/sitemap_index.xml

I looked at your sitemap doc and using https://www.modish.co.nz?sitemap=1 shows the sitemap. Do I add the code (as per your sitemap doc) above the “wordpress” section in .htaccess or below or does it not matter? My site is one Siteground. Here is my htaccess file-
# HTTPS forced by SG-Optimizer
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
</IfModule>
# END HTTPS
# BEGIN WordPress
# The directives (lines) between “BEGIN WordPress” and “END WordPress” are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* – [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I also have a couple of 301 re-directs that don’t work most are working) e.g. this one https://www.modish.co.nz/soap-cutter which should re-direct to https://www.modish.co.nz/product/multi-bar-soap-cutter/ but it goes to my WordPress login page!

Kind regards
Rich